Can a dermatologist give me something to make my eyebrows grow back . ?

Check cause first : You should have your doctor determine the cause of why the eyebrow hairs fell out first. This requires further testing, and work up. This is important as it may related to other endocrine or hormonal conditions, or medical causes that can easily be addressed, and corrected. Start there, and you'll both be in a better position to determine what to do next.